Guard for inverted incandescent mantles.



H. ROSBNTHAL.

GUARD FOR INVBRTBD INGANDESGENT MANTLES.

APPLICATION HLBD JULY 15,1913.

1,1 17,521, Patented Nov.17. 1914.

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tHE MORRIS FErENS C0.. PHOTCLLITNO. WASHINmNna 7V @IWI'IED STATES PATENTOFFICE.`

HANS ROSENlI-IAL, OF BERLIN, GERMANY, ASSIGNOR TO JULIUS PINTSCH AKTIENGESELLSCHAFT, OF BERLIN, GER-MANY.

GUARD FOR INVERTED INCANDESCENT MANTLES.

To all Lo/0m it may concern .Be it known that I, HANS RosnNTHAL, acitizen of the German Empire, and residing at Berlin, German Empire,have invented a certain new and useful Guard for Inverted IncandescentMantles, of which the following is a description.

The present invention relates to means for providing a provisional oremergency light in connection` with incandescent gas lamps, in case themain light or iiame becomes inoperative.

The invention relates more particularly to inverted incandescent gaslighting devices.

In view of the decreasing size of the external dimensions of a burnerfor a certain predetermined radiation of light, z'. e. owing dto theintroduction of stronger light-units. and to the employment of heatingmedia of higher tei'nperature, due to the employment of better gas, suchas gas under pressure or previous mixture of gas and air, it has becomenecessary to shape the lower end of the guardso as to prevent the glassfrom breaking, in case the mantle broke and the flame exercised its fullheating power. For this purpose, among other known means, a baille platehas been employed.

The object of the present invention is to provide a special incandescentbody in the bot-tom oit the guard, which shall be rendered incandescentby the heating iiame when the mantle is inoperative. The same result maybe attained also by properly constructing the baille plate. This bodymust consist of a refractory material such, for instance, as magnesium,aluminum, metal, metallic oXid or of a nare earth and may be of anydesired shape. In many cases this body will be advantageously madeconical or provided with conical projections, in order to retain partsof the destroyed mantle or hood. The body may also be constructed as asaucer or hollow ball or cylinder. with advantage, especially if holesare provided in the saucer or ball for the outlet of gases ofcombustion, or if they contain a material of high illuminating power,such as incandescent material.

In the drawing, Figure l is a sectional view of a mantle carrier andguard. Figs. 2, 3, 4 and 5 show various forms of my invention adapted tobe applied within the supporting guard of the gas lamp.

`Speeicaton of Letters Patent.

Application filed` July 15, 1913.

Patented Nov. 17, 1914.

Serial No. 779,177.

In the drawing Fig. l shows any ordinary :l'orm of mantle support for agas lamp at A. and the mantle at B with a protecting guard 0r frame C,this guard terminating in a base section a. In case the mantle is brokenor destroyed it is desired to continue the light in some measure and tothis end I provide a separate body of incandescent material supported bythe guard, `preterably by the base section thereof so as to be in linewith the gas jet and to be made incandescent thereby. I may, as shown inFig. 2, make this body in the form of a cup which may receive the brokenparts of the mantle. as shown in Fig. 3, it may be made with a.

base oil dislt form and an upstanding pointed section. In Fig. 4 I haveshown a pronged device, and as shown in Fig. 5 I may vary this by aseries of prongs of unequal. length. The flame from the gas impingingupon this body makes i-t incandescent, and thus when the mantle becomesdefective or inoperative for any reason the incandescent body becomeseffective. It is also advantageous to prevent this emergency arrangementfrom devia-ting too much heat to the guard, since this would of coursediminish the illuminating effect. further improvement is attained if anautomatic igniting device by means of platinum, platinum black or thelike material is applied to the emergency device, which would avoid theescape of unburnt gas in any case. On the other hand all devices areobjectionable which glow, when the main light operates properly, as alsoall devices attached to the lamp glass independently of the mantle,because they render the cleaning of the glass difficult, they are easilydamaged and their replacement is often overlooked. The guard orprotecting cage is the best place for the emergency illumination.

I claim as my invention 1. In combination with an inverted incandescentburner having a guard, a separate incandescent body in the bottom of theguard adapted to be rendered incandescent bv the main flame.

Q. In combination with an inverted incandescent burner having a guard, aseparate incandescent body in the bottom of the guard adapted to berendered incandescent by the main `Haine and provided with radiallyextending arms.

3. In combination with an inverted incandescent burner having a guard,'2L separate incandescent body n the bottom of the guard adapted to berendered incandescent by the main flame and havin a cup mounted in thebottom of the guar to receive broken parts of a defective incandescentbody.

HANS ROSENTHAL.

Witnesses HENRY HASPER, /VOLDEMAR HAUPT.

Copies of this patent may be obtainedionve' cents each, fby addressingthe l Commissioner of Patents,

Washington, D. C.

